Insights into the enhanced activity and SO2 resistance of air oxidation treated Mn-Fe doped biochar catalyst in the low-temperature catalytic reduction of NOx with NH3

Zhou, Tongxiao; Liu, Lu; Wang, Bangda; Ma, Shenggui; Dai, Zhongde; Jiang, Wenju; Jiang, Xia

doi:10.1016/j.fuel.2023.129989

Fuel

2024

DOI: 10.1016/j.fuel.2023.129989

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Insights into the enhanced activity and SO2 resistance of air oxidation treated Mn-Fe doped biochar catalyst in the low-temperature catalytic reduction of NOx with NH3

Tongxiao Zhou,

Lu Liu,

Bangda Wang

et al.

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Cited by 5 publications

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Effect of Nb‐doping on the MnFeO_x catalyst for NH₃‐SCR reaction at low‐temperature

Pei,

Zhao,

Wang

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDManganese‐based catalysts were considered the most promising catalysts for low‐temperature selective catalytic reduction (NH3‐SCR) reactions. In this work, a series of Mn3Fe2NbyOx catalysts were synthesized by co‐precipitation method for low‐temperature NH3‐SCR and SO2 tolerance tests.RESULTSThe catalysts were characterized by BET, SEM, XRD, XPS, H2‐TPR, and NH3‐TPD. Mn3Fe2Nb0.01Ox exhibited exceptionally high activity with a conversion of almost 100% from 80°C to 240°C, and a NO conversion of more than 75% at 40°C, while the NO conversion at 140°C in the presence of 100 ppm SO2 remained above 90% for 4 h.CONCLUSIONAccording to the characterization results, Nb modification can expand the specific surface area of the catalyst, improve the structure of the catalyst, and make the active components on the catalyst surface more dispersed. Moreover, the Nb‐modified catalyst reduced the content of Mn2+ on the catalyst surface and strengthened the electronic interactions between elements. The synergistic effects among Mn, Fe, and Nb facilitate the formation of more chemically adsorbed oxygen, which enhances the reduction capacity of the catalyst. This facilitates the adsorption of NH3 by the catalyst at low temperatures and promotes the process of low‐temperature NH3‐SCR reaction. More importantly, the Nb‐modified catalyst possessed more weak acid sites, and the higher surface acidity was conducive to the inhibition of SO3 generation, which enhanced the sulfur poisoning resistance of the catalyst. © 2024 Society of Chemical Industry (SCI).

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Effect of Nb‐doping on the MnFeO_x catalyst for NH₃‐SCR reaction at low‐temperature

Pei,

Zhao,

Wang

et al. 2024

J of Chemical Tech & Biotech

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High-temperature selective reduction of NOx into N2 catalyzed by different ion-doped titania

Wang,

et al. 2024

Chemical Engineering Journal

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Facile preparation of Fe-Beta zeolite supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NOx and soot

Chen,

Zhou,

Wang

et al. 2024

Chinese Journal of Chemical Engineering

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Insights into the enhanced activity and SO2 resistance of air oxidation treated Mn-Fe doped biochar catalyst in the low-temperature catalytic reduction of NOx with NH3

Cited by 5 publications

References 73 publications

Effect of Nb‐doping on the MnFeO_x catalyst for NH₃‐SCR reaction at low‐temperature

Effect of Nb‐doping on the MnFeO_x catalyst for NH₃‐SCR reaction at low‐temperature

High-temperature selective reduction of NOx into N2 catalyzed by different ion-doped titania

Facile preparation of Fe-Beta zeolite supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NOx and soot

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Insights into the enhanced activity and SO2 resistance of air oxidation treated Mn-Fe doped biochar catalyst in the low-temperature catalytic reduction of NOx with NH3

Cited by 5 publications

References 73 publications

Effect of Nb‐doping on the MnFeOx catalyst for NH3‐SCR reaction at low‐temperature

Effect of Nb‐doping on the MnFeOx catalyst for NH3‐SCR reaction at low‐temperature

High-temperature selective reduction of NOx into N2 catalyzed by different ion-doped titania

Facile preparation of Fe-Beta zeolite supported transition metal oxide catalysts and their catalytic performance for the simultaneous removal of NOx and soot

Contact Info

Product

Resources

About

Effect of Nb‐doping on the MnFeO_x catalyst for NH₃‐SCR reaction at low‐temperature

Effect of Nb‐doping on the MnFeO_x catalyst for NH₃‐SCR reaction at low‐temperature